Pre-dried polystyrene/alumina compound for foam extrusion
US11639429B2 · kind B2 · utility
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2References
20Claims
0Family size
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Key dates
| Filing date | Aug 4, 2020 |
| Grant date | May 2, 2023 |
| Priority date | — |
| Expiry date | May 21, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L51/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polystyrene (PS) composition for making an extruded foam, the PS composition comprising: a dried PS/alumina compound comprising a PS and an alumina additive, wherein the dried PS/alumina compound has a moisture content, measured by Coulometer, that is less than or equal to about 0.05 weight percent (wt %); and a blowing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.